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      Polylactic acid (PLA)/Silver-NP/VitaminE bionanocomposite electrospun nanofibers with antibacterial and antioxidant activity

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      Author
      Munteanu, B. S.
      Aytac, Z.
      Pricope, G. M.
      Uyar, Tamer
      Vasile, C.
      Date
      2014-10
      Source Title
      Journal of Nanoparticle Research
      Print ISSN
      1388-0764
      Publisher
      Springer
      Volume
      16
      Issue
      10
      Pages
      2643 - 2643
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      The antibacterial property of silver nanoparticles (Ag-NPs) and the antioxidant activity of Vitamin E have been combined by incorporation of these two active components within polylactic acid (PLA) nanofibers via electrospinning (PLA/Ag-NP/VitaminE nanofibers). The morphological and structural characterizations of PLA/Ag-NP/VitaminE nanofibers were performed by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy and X-ray diffraction. The average fiber diameter was 140 ± 60 nm, and the size of the Ag-NP was 2.7 ± 1.5 nm. PLA/Ag-NP/VitaminE nanofibers inhibited growth of Escherichia coli, Listeria monocytogenes and Salmonella typhymurium up to 100 %. The amount of released Ag ions from the nanofibers immersed in aqueous solution was determined by Inductively Coupled Plasma Mass Spectrometry, and it has been observed that the release of Ag ions was kept approximately constant after 10 days of immersion. The antioxidant activity of PLA/Ag-NP/VitaminE nanofibers was evaluated according to DPPH (2,2-diphenyl-1-picrylhydrazyl) method and determined as 94 %. The results of the tests on fresh apple and apple juice indicated that the PLA/Ag/VitaminE nanofiber membrane actively reduced the polyphenol oxidase activity. The multifunctional electrospun PLA nanofibers incorporating Ag-NP and Vitamin E may be quite applicable in food packaging due to the extremely large surface area of nanofibers along with antibacterial and antioxidant activities. These materials could find application in food industry as a potential preservative packaging for fruits and juices.
      Keywords
      Antibacterial
      Antioxidant
      Electrospinning
      Nanofiber
      Polylactic acid (PLA)
      Silver nanoparticles
      Vitamin E
      Permalink
      http://hdl.handle.net/11693/12468
      Published Version (Please cite this version)
      http://dx.doi.org/10.1007/s11051-014-2643-4
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      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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